Donor Base Stations for Wireless Backhaul in Rural Networks
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Solution Overview
Problem
In sparsely populated regions, traditional backhaul options like fiber or microwave for cellular network infrastructure are costly and impractical due to low network capacity requirements, necessitating a cost-effective and efficient wireless backhaul solution.
Innovation Solution
A network system is configured with donor base stations using wired backhaul to provide wireless backhaul to child nodes, optimizing frequency band usage and positioning nodes as backups to enhance network coverage and reduce downtime.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional backhaul options (fiber or microwave) are used in sparsely populated regions, then network infrastructure can be established, but the cost becomes prohibitively high and deployment becomes impractical due to low network capacity requirements
Solution Approach 1:
The patent introduces a donor base station as an intermediary node that provides wireless backhaul connectivity to child nodes in remote areas. This donor base station acts as a mediator between the core network and remote child nodes, enabling cost-effective deployment without requiring direct fiber or microwave connections to each remote node. The donor base station pools resources and provides shared backhaul access to multiple child nodes.
Solution Approach 2:
The donor base station serves multiple functions: it acts as a traditional base station providing access to user equipment, simultaneously functions as a backhaul provider to multiple child nodes, and manages wireless resource allocation. This multi-functionality reduces the need for separate dedicated infrastructure for each remote node, lowering overall deployment costs.
2Productivity
If wireless backhaul is implemented with donor base stations serving multiple child nodes, then deployment speed and cost-effectiveness improve, but network complexity increases due to frequency band management and node coordination
Solution Approach 1:
The patent dynamically adjusts network parameters such as frequency band allocation, transmission power, and resource block assignment based on network conditions, traffic demand, and node positions. The donor base station monitors channel quality and automatically reconfigures wireless backhaul parameters to optimize performance while simplifying deployment. This adaptive parameter management reduces the need for manual configuration complexity.
Solution Approach 2:
The system implements feedback mechanisms where child nodes report channel quality, signal strength, and traffic requirements to the donor base station. The donor base station uses this feedback to dynamically adjust resource allocation, frequency band assignment, and power levels. This closed-loop control automates network optimization, reducing deployment complexity and enabling rapid deployment without extensive manual configuration.
3Reliability
If frequency bands are reserved for wireless backhaul in donor base stations, then child nodes can establish reliable connections, but the available bandwidth for user access is reduced
Solution Approach 1:
The donor base station implements periodic time-division multiplexing where frequency bands are alternately allocated for backhaul communication with child nodes and for user access. During specific time intervals, the full bandwidth is dedicated to backhaul to ensure reliable child node connections, while during other intervals, the bandwidth is made available for user equipment access. This periodic switching allows the system to meet both requirements without permanently sacrificing user access bandwidth.
Solution Approach 2:
The system dynamically adjusts the proportion of bandwidth allocated to backhaul versus user access based on real-time network conditions, traffic demand, and child node requirements. When child nodes require high reliability connections, more bandwidth is temporarily allocated to backhaul. When user traffic demand is high, more bandwidth is allocated to access. This dynamic resource allocation allows the system to optimize the trade-off between backhaul reliability and user access capacity.
Data Source
AI summary
Techniques for configuring a network system including base stations that support wireless backhaul are discussed herein. To provide network coverage for a new rural area with low network capacity requirements, a service provider may initially deploy a limited network configured with wired base stations that uses fiber links as backhaul. The limited network may have large coverage gap due to the time and cost associated with deploying fiber cables. In such low traffic areas, the system may reserve a portion of available frequency bands to use as wireless backhaul and configure wireless nodes to use the backhaul provided by the reserved frequency bands. The system may configure the existing wired base stations to serve as donor nodes to provide network link for the wireless nodes. The system may deploy a network of these wireless nodes to rapidly fill in coverage gaps.